CN103527560A - Constant-force-output air-floating device with air cylinder compensation function - Google Patents
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Abstract
A constant-force-output air-floating device with the air cylinder compensation function comprises an output air cylinder and a compensating air cylinder. The output air cylinder comprises a first connecting bar piston, a first cylinder barrel, an air storage barrel and an air floating sleeve. The compensating air cylinder comprises a second connecting bar piston and a second cylinder barrel. Both the output air cylinder and the compensating air cylinder are connected with a fixing plate through a connecting support, the first connecting bar piston is composed of a long bar, a short bar and a middle piston, the long bar of the first connecting bar piston and the second connecting bar piston are connected with a connecting bar through a floating connector, the axis of the first connecting bar piston and the axis of the second connecting bar piston are on the same straight line, and the inner diameter of the first cylinder barrel is far larger than that of the second cylinder barrel. According to the constant-force-output air-floating device with the air cylinder compensation function, the compensating air cylinder and air storage tanks are additionally arranged, the larger air storage tank is communicated with the output air cylinder, pressure in the larger air storage tank is kept constant all the time, when air pressure in the output air cylinder changes because of changes of volume, values of changes are measured through a differential pressure sensor and then fed back to the compensating air cylinder for compensation, and high-accuracy constant-force output can be achieved.
Description
Technical field
The present invention relates to constant force output unit.
Background technique
According to its different applied environments and application requirements, constant force output has various structures and implementation method.Dynamically constant force output refers to a constant power value is carried in the target workpiece of dynamic motion.
By counterweight and target workpiece, hanging is the simplest and conventional method that applies constant force, because counterbalance mass is constant, so the force retaining acting in target workpiece is constant, but when target workpiece is done acceleration or deceleration motion, counterweight can produce because of the impact of self inertia power one and act on the additional force in target workpiece, and the larger impact of counterbalance mass is larger, therefore this method is only applicable to the occasion of target workpiece low speed or uniform motion.Torque motor, hydraulic cylinder etc. are also often applied to constant force output field.As " hydraulic pressure installation of constant force output " that number of patent application is 201120495617.7 just announced a kind of hydraulic pressure installation of exporting accurate power value by PLC controller, electromagnetic proportional valve, pressure transducer, but in this device, pressure transducer is arranged on the output terminal of hydraulic pressure installation, pressure transducer is kept in motion, and therefore can affect the validity of measured value.Air supporting is used widely in realizing ultraprecise constant force output control, minute-pressure action control without friction cylinder, between piston and cylinder barrel, by gas lubrication, do not have frictional force, the power therefore acting on piston is relevant with the air pressure size in cylinder barrel with the cross-section area of piston; Number of patent application be 201110072339.9 " with air-bearing without friction cylinder " announced a kind of air supporting without friction cylinder, owing to connecting admission line on its piston rod, can to output power value exert an influence; Moreover the speed of response of gas is slow, the Volume Changes that the motion of cylinder barrel inner carrier produces can cause air pressure transition, causes the fluctuation of output constant force, therefore, air supporting is generally used for realizing action output without friction cylinder, and constant voltage control ratio is more difficult, is difficult to guarantee the constant of ouput force value.Summary of the invention
For ouput force value in existing constant force output unit, be difficult to keep constant, accurate not, the small constant force of sensor measurement to be difficult to the problems such as control, the invention provides a kind of unaffected by disturbance of air pipes, with compensation cylinder, ouput force value accurately, the constant force output air-floating apparatus of good stability.
The technical solution adopted for the present invention to solve the technical problems is:
A constant force output air-floating apparatus for compensation cylinder, comprises output cylinder, compensation cylinder; Described output cylinder comprises first connecting rod piston, the first cylinder barrel, gas storage jacket, air supporting cover, and wherein, described air supporting cover comprises the first air supporting cover, the second air supporting cover and the 3rd air supporting cover; Described compensation cylinder comprises second connecting rod piston, the second cylinder barrel; Described output cylinder is all connected with fixed plate by connection bracket with compensation cylinder, and the axle center of the second connecting rod piston in the first connecting rod piston in described output cylinder and compensation cylinder is on same straight line.
Described the first air supporting cover is sleeved in gas storage jacket, and described gas storage jacket and the first cylinder barrel end face are affixed, and described the second air supporting cover is sleeved on the upper end of gas storage jacket, and described the 3rd air supporting cover is sleeved on the lower end of the first cylinder barrel; Described first connecting rod piston is comprised of stock, quarter butt and intermediate piston, described intermediate piston is sleeved in the first cylinder barrel, between the piston wall of described intermediate piston and the first cylinder barrel, leave minimum gap, described stock through the first air supporting cover, the second air supporting cover and and the first air supporting cover, the second air supporting cover inwall between leave minimum gap, described quarter butt end through the 3rd air supporting cover and and the 3rd air supporting cover inwall between leave minimum gap, described the second air supporting cover and the 3rd air supporting are overlapped and are fixed with the first connection bracket respectively.
Described second connecting rod piston comprises piston and piston rod, described piston sleeve be contained in the second cylinder barrel and and the second inner wall of cylinder between leave minimum gap, described the second cylinder barrel two ends are fixed with the second connection bracket respectively, described piston rod is through the second connection bracket; The stock of described first connecting rod piston is connected with connecting rod by floating junction with the piston of second connecting rod piston, and on described connecting rod and piston rod, all cover has air-bearing, and described air-bearing and the second connection bracket are fixed.
Described the first internal diameter of cylinder is much larger than the second internal diameter of cylinder.
Between described gas storage jacket and stock, form air storing cavity, described gas storage jacket is provided with the first suction port, and described the first suction port communicates with air storing cavity; Described the first cylinder barrel two ends are respectively equipped with the second suction port, the first air outlet and air supporting suction port, described the second suction port connects differential pressure transducer and large gas holder by tracheae, described the second cylinder barrel two ends are respectively equipped with the 3rd suction port and the 4th suction port, and described the 3rd suction port is connected Proportional valve and little gas holder by tracheae respectively with the 4th suction port.
Described stock center is beaten axial blind hole and is formed the first inlet hole, the first throttle orifice is radially uniformly distributed along the circumference on described intermediate piston, described first radially throttle orifice communicate with described the first inlet hole, the described first suit orifice plug in throttle orifice radially, described first radially throttle orifice in axial direction have two groups at least; On described stock, have radial direction through hole and form the second inlet hole, described the second inlet hole communicates with the first inlet hole, and described the second inlet hole is positioned at air storing cavity; Described stock end face suit sealing cover.
Described connecting rod piston is provided with the first pressure relief groove, and described the first pressure relief groove comprises interior the first uniform radial blind holes of the first groove, the first groove, interior uniform the first axial blind hole communicating with the first radial blind holes of quarter butt on intermediate piston external cylindrical surface; Described the first groove has two groups and be positioned at first both sides of throttle orifice radially at least; Isolation mutually between described the first pressure relief groove and described first segment discharge orifice, the first inlet hole.
Described the first air supporting puts uniform axial blind hole and forms the second inlet hole, described the second inlet hole communicates with air storing cavity, described the first air supporting cover second throttle orifice radially that is uniformly distributed along the circumference, described second radially throttle orifice communicate with described the second inlet hole, the described second suit orifice plug in throttle orifice radially.Described the first air supporting puts and is provided with the second pressure relief groove, and described the second pressure relief groove comprises the second groove, the second radial blind holes in the second groove and the second radial direction through hole on inner cylindrical surface, the second axial blind hole communicating with the second radial blind holes and the second radial direction through hole; Described second axial blind hole one end seals by sealing plug, and described the second radial direction through hole communicates with ambient atmosphere; Described the second groove has two groups and be positioned at second both sides of throttle orifice radially, radially isolation mutually between throttle orifice of described the second pressure relief groove and second.
Described the second air supporting puts uniform axial blind hole and forms the 3rd inlet hole, described the 3rd inlet hole communicates with air storing cavity, described the second air supporting cover the 3rd throttle orifice radially that is uniformly distributed along the circumference, the described the 3rd radially throttle orifice communicate with described the 3rd inlet hole, the described the 3rd suit orifice plug in throttle orifice radially.Described the second air supporting puts and is provided with the 3rd pressure relief groove, and described the 3rd pressure relief groove comprises interior the 3rd uniform radial blind holes of the 3rd groove, the 3rd groove on inner cylindrical surface, the 3rd axial blind hole communicating with the 3rd radial blind holes; Described the 3rd groove is near air storing cavity, and described the 3rd axial blind hole one end communicates with ambient atmosphere, radially isolation mutually between throttle orifice of described the 3rd pressure relief groove and the 3rd.
Described the 3rd air supporting cover external cylindrical surface is provided with the 4th groove, and described the 4th groove communicates with the air supporting suction port on cylinder barrel, the 4th throttle orifice radially that is uniformly distributed along the circumference in described the 4th groove, and the described the 4th is radially set with orifice plug in throttle orifice.Described the 3rd air supporting puts and is provided with the 4th pressure relief groove, described the 4th pressure relief groove comprises interior the 4th uniform radial blind holes of the 5th groove, the 5th groove on inner cylindrical surface, the four-axial blind hole communicating with the 4th radial blind holes, described four-axial blind hole one end communicates with ambient atmosphere, radially isolation mutually between throttle orifice of described the 4th pressure relief groove and the 4th.
The 5th throttle orifice is radially uniformly distributed along the circumference on the piston of described second connecting rod piston, described piston is beaten axial blind hole along end face and is formed the 4th inlet hole, described the 4th inlet hole with the 5th radially throttle orifice communicate, the described the 5th suit orifice plug in throttle orifice radially, the described the 5th radially throttle orifice in axial direction have two groups at least; Described piston is provided with the 5th pressure relief groove, described the 5th pressure relief groove comprises interior the 5th uniform radial blind holes of the 6th groove, the 6th groove on outside piston cylinder, the 5th axial blind hole communicating with the 5th radial blind holes, described the 5th axial blind hole one end communicates with ambient atmosphere by piston rod, radially isolation mutually between throttle orifice of described the 5th pressure relief groove and the 5th.
Mentality of designing of the present invention shows: because piston cross-section area is certain, thus constant as long as assurance enters into the gas pressure of inner cavity of cylinder, can guarantee that the power value of output is constant.But piston moves and causes that cavity volume changes, and gas compensation exists certain hysteresis quality, thereby causes air pressure transition, causes Output force wave.Therefore, the present invention has increased compensation cylinder and gas holder, and large gas holder communicates with output cylinder, remain that large gas holder internal pressure is constant, when output cylinder internal air pressure changes because volume-variation produces, by differential pressure transducer, measure changing value, then feed back to compensation cylinder and compensate;
The second connecting rod piston of the first connecting rod piston of output cylinder and compensation cylinder couples together by connecting rod, compensation cylinder adopts little gas holder to control separately, the force value size of passing ratio valve adjustment compensation cylinder inside connecting rod piston both sides, controls the corresponding equilibrant force value of output by pressure difference; The internal diameter of cylinder of compensation cylinder is less than output cylinder, and gas reaction speed has improved the precision of compensation; The stroke of second connecting rod piston is identical with output cylinder stroke, and piston is provided with radially throttle orifice air feed, guarantees to form stable air film between piston and the second cylinder barrel, does not have frictional force, and constant force output is more accurate;
Connecting rod piston is by stock, quarter butt and intermediate piston partly form, between intermediate piston and cylinder barrel, form two air-inlet cavitys, connecting rod piston stock is set with gas storage jacket outward and forms air storing cavity, gas in air storing cavity enters in connecting rod piston by the first inlet hole on stock and the second inlet hole, again by first on piston portion radially throttle orifice between piston wall and cylinder barrel, form and stablize air film, disturbing influence when this kind of plenum system avoided adopting tracheae air feed on the one hand, changed on the other hand the former mode that has or not friction cylinder to adopt cylinder barrel self pressurized gas air feed, air film between piston and cylinder barrel forms more stable.
Between gas storage jacket and cylinder barrel, by the first air supporting cover sealing, cylinder barrel and gas storage jacket two ends are respectively by the second air supporting cover and the sealing of the 3rd air supporting cover.The first air supporting cover and the second air supporting cover all adopt the gas air feed in air storing cavity.Air supporting cover seals and supports for piston provides, and plenum system is simple, and bearing capacity is strong.
Radially near throttle orifice, be equipped with pressure relief groove, pressure relief groove communicates with extraneous normal pressure, prevents that cylinder barrel inner high voltage gas from entering air supporting gap air film is exerted an influence on the one hand, plays seal action, forms on the other hand atmospheric area in gap, promotes the formation of air film.
Advantage of the present invention is: can realize constant force output, good stability, precision are high.
Figure of description
Fig. 1 is a kind of output of the constant force with compensation cylinder air-floating apparatus schematic diagram
Fig. 2 is first connecting rod piston schematic diagram
Fig. 3 is the first air supporting cover schematic diagram
Fig. 4 is the second air supporting cover schematic diagram
Fig. 5 is the 3rd air supporting cover schematic diagram
Embodiment
By reference to the accompanying drawings 1～5, a kind of output of the constant force with compensation cylinder air-floating apparatus, comprises output cylinder, compensation cylinder; Output cylinder comprises first connecting rod piston 3, the first cylinder barrel 7, gas storage jacket 13, air supporting cover, and wherein, air supporting cover comprises first air supporting cover the 12, second air supporting cover the 17 and the 3rd air supporting cover 4; Compensation cylinder comprises second connecting rod piston 24, the second cylinder barrel 23; Output cylinder is all connected with fixed plate 1 by connection bracket with compensation cylinder, and the axle center of the second connecting rod piston 24 in the first connecting rod piston 3 in output cylinder and compensation cylinder is on same straight line.
The first air supporting cover 12 is sleeved in gas storage jacket 13, and gas storage jacket 13 and the first cylinder barrel 7 end faces are affixed, and the second air supporting cover 17 is sleeved on the upper end of gas storage jacket 13, and the 3rd air supporting cover 4 is sleeved on the lower end of the first cylinder barrel 7; First connecting rod piston 3 is comprised of stock, quarter butt and intermediate piston, intermediate piston is sleeved in the first cylinder barrel 7, between the piston wall of intermediate piston and the first cylinder barrel, leave minimum gap, stock through first air supporting cover the 12, second air supporting cover 17 and and the 12, second air supporting of the first air supporting cover overlap and between 17 inwalls, leave minimum gap, quarter butt end through the 3rd air supporting cover 4 and and the 3rd air supporting cover inwall between leave minimum gap, the second air supporting cover the 12 and the 3rd air supporting cover 17 is fixing with the first connection bracket 2 respectively.
Second connecting rod piston 24 comprises piston and piston rod, piston sleeve be contained in the second cylinder barrel 23 and and the second inner wall of cylinder between leave minimum gap, the second cylinder barrel 23 two ends are fixing with the second connection bracket 22 respectively, piston rod is through the second connection bracket 22; The stock of first connecting rod piston 3 is connected with connecting rod 20 by floating junction 19 with the piston of second connecting rod piston 24, and on connecting rod 20 and piston rod, all cover has air-bearing 21, and air-bearing 21 and the second connection bracket 22 are fixing.
The internal diameter of the first cylinder barrel 7 is much larger than the internal diameter of the second cylinder barrel 23.
Between gas storage jacket 13 and stock, form air storing cavity 16, gas storage jacket 13 is provided with the first suction port 15, the first suction ports 15 and communicates with air storing cavity 16; The first cylinder barrel 7 two ends are respectively equipped with the second suction port 6, the first air outlet 11 and air supporting suction port 5, the second suction port 6 connects differential pressure transducer and large gas holder by tracheae, the second cylinder barrel 23 two ends are respectively equipped with the 3rd suction port 28 and the 4th suction port 47, the three suction ports 28 are connected Proportional valve and little gas holder by tracheae respectively with the 4th suction port 47.
Stock center is beaten axial blind hole and is formed the first inlet hole 10, the first throttle orifice 9 is radially uniformly distributed along the circumference on intermediate piston, first radially throttle orifice 9 communicate with described the first inlet hole 10, the first interior suit orifice plug of throttle orifice 9 radially, first radially throttle orifice 9 in axial direction have two groups; On stock, have radial direction through hole and form the second inlet hole 14, the second inlet holes 14 and communicate with the first inlet hole 10, the second inlet hole 14 is positioned at air storing cavity 16; Stock end face suit sealing cover 18.
Connecting rod piston 3 is provided with the first pressure relief groove, and the first pressure relief groove comprises interior uniform the first axial blind hole 38 communicating with the first radial blind holes 39 of the first groove 8, interior the first uniform radial blind holes 39 of the first groove 8, quarter butt on intermediate piston external cylindrical surface; The first groove 8 has two groups and be positioned at first both sides of throttle orifice 9 radially; Isolation mutually between the first pressure relief groove and described first segment discharge orifice 9, the first inlet hole 10.
On the first air supporting cover 12, uniform axial blind hole forms the second inlet hole 33, the second inlet hole 33 communicates with air storing cavity 16, the first air supporting cover 12 be uniformly distributed along the circumference second radially throttle orifice 34, the second radially throttle orifice 34 communicate with described the second inlet hole 33, the second interior suit orifice plug of throttle orifice 34 radially.The first air supporting cover 12 is provided with the second pressure relief groove, and the second pressure relief groove comprises the second groove 32, the second radial blind holes 48 in the second groove 32 and the second radial direction through hole 44 on inner cylindrical surface, the second axial blind hole 43 communicating with the second radial blind holes 48 and the second radial direction through hole 44; Second axial blind hole 43 one end seal by sealing plug 42, and the second radial direction through hole 44 communicates with ambient atmosphere; The second groove 32 has two groups and be positioned at second both sides of throttle orifice radially, radially isolation mutually between throttle orifice 34 of the second pressure relief groove and second.
On the second air supporting cover 17, uniform axial blind hole forms the 3rd inlet hole 30, the 3rd inlet hole 30 communicates with air storing cavity 16, the second air supporting cover 17 be uniformly distributed along the circumference the 3rd radially throttle orifice 29, the three radially throttle orifice 29 communicate with the 3rd inlet hole 30, the 3rd interior suit orifice plug of throttle orifice 29 radially.The second air supporting cover 17 is provided with the 3rd pressure relief groove, the 3rd axial blind hole 41 that the 3rd pressure relief groove comprises the 3rd groove 31 on inner cylindrical surface, interior the 3rd uniform radial blind holes 40 of the 3rd groove 31, communicates with the 3rd radial blind holes 40; The 3rd groove 31 communicates with ambient atmosphere near air storing cavity 16, the three axial blind hole 41 one end, radially isolation mutually between throttle orifice 29 of the 3rd pressure relief groove and the 3rd.
The 3rd air supporting is overlapped 4 external cylindrical surfaces and is provided with the 4th groove 37, the four grooves 37 and communicates with the air supporting suction port 5 on cylinder barrel, 37 the 4th throttle orifice 36, the four interior suit orifice plugs of throttle orifice 36 radially radially that are uniformly distributed along the circumference in the 4th groove.The 3rd air supporting cover 4 is provided with the 4th pressure relief groove, the four-axial blind hole 46 that the 4th pressure relief groove comprises the 5th groove 35 on inner cylindrical surface, interior the 4th uniform radial blind holes 45 of the 5th groove 35, communicates with the 4th radial blind holes 45, four-axial blind hole 46 one end communicate with ambient atmosphere, radially isolation mutually between throttle orifice 36 of the 4th pressure relief groove and the 4th.
The 5th throttle orifice is radially uniformly distributed along the circumference on the piston of second connecting rod piston 24, piston is beaten axial blind hole along end face and is formed the 4th inlet hole, the 4th inlet hole with the 5th radially throttle orifice communicate, the 5th suit orifice plug in throttle orifice radially, the 5th radially throttle orifice in axial direction have two groups at least; Piston is provided with the 5th pressure relief groove, the 5th axial blind hole 27 that the 5th pressure relief groove comprises the 6th groove 25 on outside piston cylinder, interior the 5th uniform radial blind holes 26 of the 6th groove 25, communicates with the 5th radial blind holes 26, the 5th axial blind hole 27 one end communicate with ambient atmosphere by piston rod, radially isolation mutually between throttle orifice of the 5th pressure relief groove and the 5th.
Claims (2)
1. with a constant force output air-floating apparatus for compensation cylinder, it is characterized in that: comprise output cylinder, compensation cylinder; Described output cylinder comprises first connecting rod piston, the first cylinder barrel, gas storage jacket, air supporting cover, and wherein, described air supporting cover comprises the first air supporting cover, the second air supporting cover and the 3rd air supporting cover; Described compensation cylinder comprises second connecting rod piston, the second cylinder barrel; Described output cylinder is all connected with fixed plate by connection bracket with compensation cylinder, and the axle center of the second connecting rod piston in the first connecting rod piston in described output cylinder and compensation cylinder is on same straight line;
Described the first air supporting cover is sleeved in gas storage jacket, and described gas storage jacket and the first cylinder barrel end face are affixed, and described the second air supporting cover is sleeved on the upper end of gas storage jacket, and described the 3rd air supporting cover is sleeved on the lower end of the first cylinder barrel; Described first connecting rod piston is comprised of stock, quarter butt and intermediate piston, described intermediate piston is sleeved in the first cylinder barrel, between the piston wall of described intermediate piston and the first cylinder barrel, leave minimum gap, described stock through the first air supporting cover, the second air supporting cover and and the first air supporting cover, the second air supporting cover inwall between leave minimum gap, described quarter butt end through the 3rd air supporting cover and and the 3rd air supporting cover inwall between leave minimum gap, described the second air supporting cover and the 3rd air supporting are overlapped and are fixed with the first connection bracket respectively;
Described second connecting rod piston comprises piston and piston rod, described piston sleeve be contained in the second cylinder barrel and and the second inner wall of cylinder between leave minimum gap, described the second cylinder barrel two ends are fixed with the second connection bracket respectively, described piston rod is through the second connection bracket; The stock of described first connecting rod piston is connected with connecting rod by floating junction with the piston of second connecting rod piston, and on described connecting rod and piston rod, all cover has air-bearing, and described air-bearing and the second connection bracket are fixed;
Described the first internal diameter of cylinder is much larger than the second internal diameter of cylinder;
Between described gas storage jacket and stock, form air storing cavity, described gas storage jacket is provided with the first suction port, and described the first suction port communicates with air storing cavity; Described the first cylinder barrel two ends are respectively equipped with the second suction port, the first air outlet and air supporting suction port, described the second suction port connects differential pressure transducer and large gas holder by tracheae, described the second cylinder barrel two ends are respectively equipped with the 3rd suction port and the 4th suction port, and described the 3rd suction port is connected Proportional valve and little gas holder by tracheae respectively with the 4th suction port;
Described stock center is beaten axial blind hole and is formed the first inlet hole, the first throttle orifice is radially uniformly distributed along the circumference on described intermediate piston, described first radially throttle orifice communicate with described the first inlet hole, the described first suit orifice plug in throttle orifice radially, described first radially throttle orifice in axial direction have two groups at least; On described stock, have radial direction through hole and form the second inlet hole, described the second inlet hole communicates with the first inlet hole, and described the second inlet hole is positioned at air storing cavity; Described stock end face suit sealing cover;
Described connecting rod piston is provided with the first pressure relief groove, and described the first pressure relief groove comprises interior the first uniform radial blind holes of the first groove, the first groove, interior uniform the first axial blind hole communicating with the first radial blind holes of quarter butt on intermediate piston external cylindrical surface; Described the first groove has two groups and be positioned at first both sides of throttle orifice radially at least; Isolation mutually between described the first pressure relief groove and described first segment discharge orifice, the first inlet hole;
The 5th throttle orifice is radially uniformly distributed along the circumference on the piston of described second connecting rod piston, described piston is beaten axial blind hole along end face and is formed the 4th inlet hole, described the 4th inlet hole with the 5th radially throttle orifice communicate, the described the 5th suit orifice plug in throttle orifice radially, the described the 5th radially throttle orifice in axial direction have two groups at least; Described piston is provided with the 5th pressure relief groove, described the 5th pressure relief groove comprises interior the 5th uniform radial blind holes of the 6th groove, the 6th groove on outside piston cylinder, the 5th axial blind hole communicating with the 5th radial blind holes, described the 5th axial blind hole one end communicates with ambient atmosphere by piston rod, radially isolation mutually between throttle orifice of described the 5th pressure relief groove and the 5th.
2. a kind of constant force with compensation cylinder as claimed in claim 1 is exported air-floating apparatus, it is characterized in that: described the first air supporting puts uniform axial blind hole and forms the second inlet hole, described the second inlet hole communicates with air storing cavity, described the first air supporting cover second throttle orifice radially that is uniformly distributed along the circumference, described second radially throttle orifice communicate with described the second inlet hole, the described second suit orifice plug in throttle orifice radially.Described the first air supporting puts and is provided with the second pressure relief groove, and described the second pressure relief groove comprises the second groove, the second radial blind holes in the second groove and the second radial direction through hole on inner cylindrical surface, the second axial blind hole communicating with the second radial blind holes and the second radial direction through hole; Described second axial blind hole one end seals by sealing plug, and described the second radial direction through hole communicates with ambient atmosphere; Described the second groove has two groups and be positioned at second both sides of throttle orifice radially, radially isolation mutually between throttle orifice of described the second pressure relief groove and second;
Described the second air supporting puts uniform axial blind hole and forms the 3rd inlet hole, described the 3rd inlet hole communicates with air storing cavity, described the second air supporting cover the 3rd throttle orifice radially that is uniformly distributed along the circumference, the described the 3rd radially throttle orifice communicate with described the 3rd inlet hole, the described the 3rd suit orifice plug in throttle orifice radially; Described the second air supporting puts and is provided with the 3rd pressure relief groove, and described the 3rd pressure relief groove comprises interior the 3rd uniform radial blind holes of the 3rd groove, the 3rd groove on inner cylindrical surface, the 3rd axial blind hole communicating with the 3rd radial blind holes; Described the 3rd groove is near air storing cavity, and described the 3rd axial blind hole one end communicates with ambient atmosphere, radially isolation mutually between throttle orifice of described the 3rd pressure relief groove and the 3rd;
Described the 3rd air supporting cover external cylindrical surface is provided with the 4th groove, and described the 4th groove communicates with the air supporting suction port on cylinder barrel, the 4th throttle orifice radially that is uniformly distributed along the circumference in described the 4th groove, and the described the 4th is radially set with orifice plug in throttle orifice; Described the 3rd air supporting puts and is provided with the 4th pressure relief groove, described the 4th pressure relief groove comprises interior the 4th uniform radial blind holes of the 5th groove, the 5th groove on inner cylindrical surface, the four-axial blind hole communicating with the 4th radial blind holes, described four-axial blind hole one end communicates with ambient atmosphere, radially isolation mutually between throttle orifice of described the 4th pressure relief groove and the 4th.
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| CN201310492896.5A CN103527560B (en) | 2013-10-18 | 2013-10-18 | A kind of constant force with compensation cylinder exports air-floating apparatus |
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| CN201310492896.5A CN103527560B (en) | 2013-10-18 | 2013-10-18 | A kind of constant force with compensation cylinder exports air-floating apparatus |
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| CN103527560A true CN103527560A (en) | 2014-01-22 |
| CN103527560B CN103527560B (en) | 2015-12-02 |
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| CN111946816A (en) * | 2020-08-25 | 2020-11-17 | 苏州大学 | Air-float piston and air cylinder |
| CN112384777A (en) * | 2018-07-11 | 2021-02-19 | 日本精工株式会社 | Bearing device and spindle device of machine tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103527560B (en) | 2015-12-02 |
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